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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01728d04711450edc424af9620579f3dad7d7271a003c6c71d8b0cd067b0d3b5' 
  AND token = 'qR3DO5G4rc7N55JQtTPM8lVtDQC5loH6sTXSIuImjwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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