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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22435e860f2615d5666961c99ed6e7ce95bfff8ad6fa6da03705a3f10564ef21' 
  AND token = 'XGfTfQf5pN7i2N6gYxjlmH9xF+5szoJ/+6UMZEGFTgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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