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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aedb092b8b04cb2ca57b234e51b9a71471f8a9806b40e2749570188bc2a336b' 
  AND token = 'ge5akcULW4lE/gOKQMkoDIROPlvy4hjHW5Y6e1H9a9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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