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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd10423fc271923877776de4b6f106ae8cd9e94d63df49ed3ce66496ab82afe82' 
  AND token = 'neNlNhO+vR71bc8o2+PPOuIDCLoopBsA8U86Wo4rU4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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