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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '901c02ae2a74531a3b1208ab280b43bae7e25339eeb3508770d425eaecae41a3' 
  AND token = 'wX4eHz61IlQPCcrx+NGEX9/0F7M3KJx2dlxEv1jjoUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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