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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8639cce20eafdd13193bfd7e2f5d51131e6cad8885f6e17aa4e09d00582e046' 
  AND token = 'czzsm17HCN4sfFYxARFPGXybiW5Wg8kXMuQKQS5Jgik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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