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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14cdd4693ec600eeedf588bac528350c93e13129d584f864bb51c0b29088adf9' 
  AND token = 'X1B17RTVuhSo9CoiDiTQlLfiv4XqYN/IjWhiA7iDGFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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