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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7009c5780c7b143d3adbac0cd0147e3855d3895b06206386c740078824dc3824' 
  AND token = 'zqcC1TS3r75g2ZqlIlT9j9B2uUt/iqhJoXrGwnI1ea8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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