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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '441181ce6e7eda66cc687cfe9b2df8f71382b06e6f644931d686f9efb25c2700' 
  AND token = 'j3DNXbL5hqEgSfb7hhPnIHBlh6/eS6Q4bynxQkhn7DY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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