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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f1420b668d10b449ac45b210177b3dc5460b4f979c65c1ee3e9e72949dc2f95d' 
  AND token = 'y0ljnPZFdI8x84B5VHls9/gu/5u8ooh+ny7/tyxboz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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