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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6065c97e9a64abafec1beff51c532f1f4686411366ea1f9c6df317868a912eac' 
  AND token = 'SeP0OhtlTaAOCvO1/MlauvwtNl97vJ7fIrOyRLV3tkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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