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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5180d3e5207c0814b55227950fbb0bc7d122384d673505c4fcb2c6410c5b7a2' 
  AND token = 'wB2APX4Pjfa670PW/271xpX/Q5zQPtWVlDLzGaGFbxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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