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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62213bcbd55b2424383bb0bd9158e43c24f87a96ae7a57d9b61ba07b5a854783' 
  AND token = 'dgCbN3BO+eyfMAX955JRNszBmL6ODrWaOdkRo1a1R/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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