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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5362ea8439b99caba55d1907eba0c7afc294e3902c374169cbc24a842895ecb0' 
  AND token = 'TFcm+i7GFCrP/nAVSu0ZMa9CwNr8sHrztguzEVXoERA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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