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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22d949e2c1f46effad83f0be0bea6467dae29b58aa0288c1551132fa8ca3782c' 
  AND token = 'mYqyH9zZXxcRINrR/ehF7qCeEhwFY+m6Ijvkc1twFe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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