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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e9184f055759e272ff26dab0296cc17168eec6876980e61e7c9320b87aa3990c' 
  AND token = 'awcn8KgTwzq20inIr/3+MC694U028xlq4I1RN7NSq9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}