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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1eb32d299cff90ab13de550c2c3b23bed8771fb1c13aadf3cba95880f341a181' 
  AND token = 'snrt26DtpCjc07b7YQiU3NaSb0W0Gm9ouCPUzoHVXzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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