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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1bcb2519334f682499b09b27826ed4b9799db939bcbe4b1407e07f10b8641a22' 
  AND token = 'dBppQMW6C+RMQLXwF4RmrUZfDHFjGx0g5+4Ri05x7Tk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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