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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed6b6fd9bfa7a89466236bfa0bdeb69495fb39ee1106b41ff811830f4eebb54c' 
  AND token = '80vfuo9xXqmmdggPN83haN2rKzyG2/0vP9Xsw3jzDtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00212

JSON explain

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