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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eed9d5593b6af7ef7f7d99458d506907c208091962c58eca450ab81d186c97e3' 
  AND token = 'gNpFtfN9ybFY1zPe/SN3Z0TuM0Iuym5HzvofJJAdWKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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