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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45753a1f4f7b2a8d6b765200f5120f3be3cf4b3015464f5a11d0bd7c98eb2908' 
  AND token = 'p1Qhy0M08GNtZcERGo3OhNqipkbjxjBeHVG9YnMfrHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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