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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '51b0633dd53c0c4e34a312a446d9e270ce0efb6449e58d09a3e1ff087043dd59' 
  AND token = 'm1qraTQivE5zUaz6FaOZRU48Ng4bXlf2Tizes9QajHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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