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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9750cd2a5448194f795f1e023191b8d7fc3e8656db3f486f8e9035dfcc450ddc' 
  AND token = 'jr9Y00w9lfBv7TeanUcuL3wLpwsB4udBO+odf9pdIns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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