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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60e9a41cf064b373ebd6618d813d3682aec71dc4d7472cfa93c6650d9baeb76b' 
  AND token = 'fQK00kw5YMxw/aYe7/ji6aG73VhflXGZb+w74m77Jlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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