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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '273369a0eebfc168ba4b49a096466eb74d4930979e7a1a586c2cc06dd88ad94c' 
  AND token = 'DQZRDLnKn54g2vaEXOVjTbM+u83TFWkj3nEEq0++tJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00117

JSON explain

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