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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcab41242b3d20edf22d8c0e322c51071748a377369f418cce50e5d0ab96404b' 
  AND token = '0LQZCNQq1FE+f/0ndL+ct9fErSbCGdS48Dodyj1FyCg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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