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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63fdd8530c4ffced8b50b53262c6e7ecb40a19880cbcb0b7d49cac4471d117c4' 
  AND token = 's+uFfxxZyHNW/mA7OEi/0BxIweUj/DS51Dgx+FlEWqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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