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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68120310987f3e2757548acae4e69373a2b8da3be7b734274b01e3b7b809327e' 
  AND token = 'DihnjMpav2vNXJzuRzfYspHT9BwWZL5aC4ZhSWBxw4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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