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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25d87262b78bd62f4f4636ae84bf41241a37cfa18c3ce5999b2a08e3aeab3319' 
  AND token = 'KuaVcyga7XsIrr+fROrDYtSpqFmtPWwYle8pE4gEAQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}