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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a148a89531e592bd79fae68b2f58c6677b88a3e06fa513e802342eab1bf3bf9' 
  AND token = 'J5WX1ExDIXg/yU4zavVUZz6DeEe3tj+iTUm1QvIs5x8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00097

JSON explain

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