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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '529a252c816fb73af9daa52a05a66582bbb69d3ca94c2441e330ba0ba6dd8215' 
  AND token = 'dd2AkHc0s/LE8chx8PAXGW+4a6sWSSRblBFecp3W2kg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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