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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9159d86eb2941f4ba7a1476dcef56e10eae7764257431f65719c9277fece65bb' 
  AND token = 'FjP1pdk1YbFdGoKK67qP+oyDOepiTrVyBvlX3QqoTqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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