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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fecd8f7325fbdb7e2d0d0dbe0879652569c4795dcaa422e6f1ac4262a0de5ce8' 
  AND token = '9oiKCjyfcQHDPgN3QbyLKdlTeHCEntNQkHGwenS5f0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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