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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b96ba85499ff3e56c72fec35e411b72fb6b3c94fd416b2dc69fb50ca4c308bf1' 
  AND token = 'xO4nnW9M07TvOmDAu9b+Op7z7DUAIeXTetYk64/iyxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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