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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9eedb0e6aee24e235852c5afbb4af5674338506639ce83218b603d4c1251276c' 
  AND token = 'OX6MOBqYU4nVgIudb3Gv4YYO+QIf4oCiSck8+c+D/VQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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