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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '283626e6a071dba7fefb5ec1e583511b243b1887e078405147128cca6329bc7b' 
  AND token = '9GZYmrtpLTUpkH7hl5UhlSbQok/VCsj20R1MWcY/OTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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