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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9156abf3a272e2c6eef17bdc16c099baf65e22824de5c95f41f2e15fcd42f948' 
  AND token = 'wRpz9BcDpu75Rg0rl/qC9DF0ac9EOhtJFr6RK7rhkHg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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