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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d9f71830feb9913f9a708b5876d256546fdfe4db0642d34657dd40f0ed6e058' 
  AND token = 'DipJFC8qmN4uf6EcgkYYsgSBlPPXe1FU80mQrgLBocE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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