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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fe733aeaf361f7d3fa773ebe1f7409d75189eac84a76530cd3de7ad047e5411' 
  AND token = '3HVOpyDd1uRhp4zSve2SIu6LSqZPBM/R0uxsxM6px0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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