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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09bb5aaeee95993642ccc8454f5a99cec263e86551ff18b73a2dd0df3bfb2bee' 
  AND token = 'tWVhJ61HVQx/9Oevu7rArsb36vL7/81Il8V7YILfur4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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