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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7efaa5a9e2d5376df002d98213b5c730bb211fb8d2507b6645da84d09afb7a03' 
  AND token = 'jFw0ZIp8BM6oMXCusmkmcHTKJ/21ME8h2c4HEnhP74o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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