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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7aafd3e8fe1d959f2c8a9bd96d3d41cbd998e682d6f04fb1f392bc89dd403b1d' 
  AND token = '+NTfPYw2+QzVYnlvM93Su4LJICT6VE/batuCTC5FEps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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