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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '072a39d1150277b0f416b58ae3fc0c085d25afaa7a1cc5211fa059de8d2f5584' 
  AND token = 'nb95SyOE+xCWMpm7UJUwM9MKmU+aa8vZtLL9tGnUBTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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