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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf988a03ce6abca3aa6ff29dbbd72e8e40372fa8fccb0762cdc2d329c47a2df6' 
  AND token = 'C19X68FGCTyjbvqyhVMoNme3C7Z25urPMrxFC7dP7FU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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