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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eb6728afed75f4dba20d5468c71ece61057e355b443c162ee46b690fdeecd4da' 
  AND token = 'nvkm1mNMNzy1+1AGjRJIYp1/BEEbBs1Njg6y1R2GXrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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