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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fe909afb742b61c002e6368cb534f6bbfa06d6fd2953d9a51ed7548d73a5b365' 
  AND token = 'ftIEFPAZLlgE3eWX5L7uBkojNuHQ3GadKIitiQ7fzg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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