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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd01210c473ac82321f6a91cf6d9d39ef2185839abb22631a9a59f5e526eff22e' 
  AND token = 'kWk+xyAS/bYJvrtIvCVSpoWenA9/8WLzueNT1kRtdDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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