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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd4da3e0d04ed8f17fdb925e6eb40bbae6d129f3ccf7cbd0cd4a996e2ac084abf' 
  AND token = '3m10VZVDIUwO6E4B2JIgMD1Q6djQdt1eVyBauRq2wDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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