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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '778e4a0a09776bddf32477c3c4f44e56e62539a88c10cf722e3740c33dc220d3' 
  AND token = 'w3neY44R8/LdedtVS6SDbc3jsc4PQ7JVm6fi71WTm/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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