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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03b47817f0d6d9ecf095807dcc3e54a31266dd8fe9b49b919b4d2f667bdcc4a0' 
  AND token = '5hv9wBEi02A4Cig320wnXinzXBbDA0jtzKaLqD27UzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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