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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c59ec2662b6b0f2ad5d957f08e009340729f726362fc69979ecb7fa5d11112dc' 
  AND token = 'I4P5/NWL6RG5l14noT81a1Dp0fo/xZnOTyVSed33RJI=' 
  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"
    }
  }
}