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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a90485d92435e4478ed825e225b6713471d63e56dcaa826eab8d92091f6f5759' 
  AND token = 'GoqxuMo3TPyvvP6Y8uP5ilC/nuHOvXMpQwLx4E9tJYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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