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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ad2a4fdb37c00ac78af9ab3fd6a0ecc8aac74b056316e67b27f3fddf6a180bf' 
  AND token = 'ZzqsAN0lSB6vjCPrKIsMctmrR8dkloPZxC3to+rBNjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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