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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc57316e71f991b6c6007d85b0604c9c071aaa8b1f354dc9849f0e48d96898d4' 
  AND token = '24U0HcUy5bM3LLW9GT5OiCLg/WQu44Ifa9XX+BFLejM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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