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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdd361c05c0241d45b5c337ab4b766d0b0db62bac74ffe141df501f122ee0905' 
  AND token = 'BHSPrIs+8eQdttZBqlo0R3prK0HLHLU91jTViZZ64lc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}