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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c9bb7c5394ef442cfffbf62bd6cfe764b27e7fdd3be80e6c77cde7d6fd93d9f3' 
  AND token = 'gGq+faT6qdDEqmY9KP7ChFIqU9jIcsSB+1U15EHVxf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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