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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff2b278d95155f5d05ce9cf286d705c0b393e0a81451093460e1146759a55328' 
  AND token = '93W2NG9jbmsP95Z7pooJo9if0VPLiQAVL2pKv+fksl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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