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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fccc7d0c11963295d1eec6f38534c0bff0ffb4eff98555a94b8ba8a60595a4b4' 
  AND token = 'APmkg4k2BC0G/gSSfefQnSfNVpXS/EUk619nEAP3e2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00109

JSON explain

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