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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ef47ab2159e0cc9ae32d8db9e520dfea45ee58ed5c188b588ad326864b08ea2' 
  AND token = 'BWyOI+BBx2BOLucfz0I5Qk8uS8t3joA8ZFtNELL5SCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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