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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d62c2e76a16ae51d0169f589f1c633a4c27c586fa9de047bfba2e7ff6cdccf9' 
  AND token = 'ww79Dbu/ISJ+293wHu1jZ86L4TuJV03Tfek/YYZ3BAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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